Gas orifice meter chart calculating machine



Oct. 20, 1936. MCGAUGHY GAS ORIFICE METER CHART CALCULATING MACHINE Original Filed Sept; 4, 1929 8 Sheets-Sheet 2 Y. 3 m M 6 0 MM m a I mmv a J 6 9m N 19 lw uw C WITNESSES Oct. 20, 1936. J, B, MCGAUGHY 2,057,664

GAS ORIFICE METER CHART CALCULATING MACHINE Original Filed Sept. 4, 1929 8 Sheets-Sheet 3 WITNESSES ATTORN EY Oct. 20, 1936. J. B. M GAUGHY GAS ORIFICE METER CHART CALCULATING MACHINE Original Filed Sept. 4, 1929. 8 Sheets-Sheet 4 INVENTOR Qau ATTORN EY Job? ' llllll W m 4 w M W Oct. go, 1936.

J. B. McGAUGHY GAS ORIFICE METER CHART CALCULATING MACHINE Original File d Sept. 4, 1929 8 Sheets-Sheet 5 ATTORN EY [WITNESSES 5 Oct. 20, 1936. r J, MOGAUGHY 2,057,664

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ATI'ORNEY Oct. 20, 1936. J. B, M GAUGHY GAS ORIFICE METER CHART CALCULATING MACHINE Original Filed Sept. 4, 1929 a Sheets-Sheet? 11,. b0 i M mm m 8 Nb 1 R W w ma T. bu N &a 3 bN uMmw A NN) SQ QR N 7A/// 4/ n Y T 0 .MB Q Pv u, .9 O QWN Nh N I I I ug Oct. 20, 1936. J. B. M GAUGHY 2,057,664

' GAS ORIFICE METER CHART CALCULATING MACHINE Original Filed'sept. 4, 1929 8 Sheets-Sheet 8 E ",9 J 1 T INVENTOR WITNESSES h cg? 2 2 zIznBMGa g J @Amc ATTORNEY Patented Oct. 20, 1936 UNITED" STATES GAS cannon METER cmm'r (momma momma John B. McGaughy, Tulsa. Okla, auignor to Pittsburgh Equitable Meter Company, Pittsburgh, Pa., a corporation of Pennsylvania Application September 4, 1929, Serial No. 390,347 Renewed October 24, 1934 47 Claims. (CL 23581) This invention relates to improvements in computing or calculating machines, and it consists of the constructions, combinations and arrangements herein described and claimed.

An object of the invention is to provide a machine of the character described which embodies several outstanding improvements over a similar machine disclosed in an application filed by John B. McGaughy, May 23, 1928, Serial No. 279,942, one of which improvements is to utilize the oflset in the centers of the prime mover and pressure disks to provide a speed change ratio in the pressure disc by virtue of now making an associated pressure wheel movable in respect to each disk with each of which it contacts.

Another object of the invention which embraces a second improvement is to widen the range of the machine by incorporating multiple cams which may be shifted from one pressure range chart to another by making a simple adjustment in the mechanism.

A further object of the invention which embraces athird improvement is to better the stopping mechanism and to incorporate therein a slipping clutch which will protect the mechanism from damage when the chart plate is brought to a sudden stop. g

A still further and fundamental object of the invention is to enable the instantaneous compuration of the so-called extension" of a meter chart by utilizing the pressure and differential curves inscribed thereon as the basis of an equation to wh ch the application of a co-eilicient will give a product in thousands of cubic feet.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings, in which:

Figure 1 is a perspective view of the improved machine,

Figure 2 is a plan view thereof, the cover being omitted,

Figure 3 is an inverted plan view of the machine,

Figure 4 is a front elevation,

Figure 5 is a longitudinal section taken on the line 55 of Figure 2,

Figure 6 is a detail sectional view particularly illustrating the bearings of the pressure disk and of the associated pressure wheel,

Figure 7 is a detail section of the extension tube and its carried Parts.

Figure 8 is an elevation of the left end of th machine,

Figure 9 is a cross section taken on the line 99 of Figure 2,

Figure 10 is a cross section taken substantially on the line lO-IO of Figure 2,

Figure 11 is a detail section taken on the line li--il oi-Flgure 10, the electrical circuit being 5 diagrammatically illustrated,

Figure 12 is a detail plan view of a portion of the base, particularly illustrating the plunger and trigger slots,

Figure 13 is a detail section taken on the line i3-l3 of Figure 10,

Figure 14 isa detail perspective view of the trigger hereinafter described,

Figure 15 is a horizontal section taken substantially on the line -l5-i5 of Figure 4, particularly illustrating the so-called pressure carriage and its multiple cams, v

Figure 16 is a detail section taken on the lin i8--i8 of Figure 2,

Figure 17 is a section taken substantially on the line i'l-ll of Figure 2, particularly illustrating the brake and rocker and the connections thereof with the control shaft and handle,

Figure 18 is a detail sectional view illustrating how the weight and pins keep the chart in place on the chart plate,

Figure 19 is a section taken on the line iB-ifi of Figure 5,

Figure 20 is a. detail sectional view or the motor mounting,

Figure 21 is a plan view of the plate support for the pressure disk II, also showing the rod by which it is carried.

As is fully developed in {the co-pending patent application identified above, it is a purpose of the machine to integrate the data on orlflce'meter charts as they are received from the field so that the quantity of fluid that has passed through an orifice during any determined time can be instantly ascertained. It is a function of the machine to enable an instant computation, thus both eliminating the laborious calculations ordinarily involved, as well 'as the clerical aid necessary to carrying them out.

It will presently appear that all the operator has to do is to fix the chart upon the chart plate, set the pointer to the starting place, start the motor and manipulate the pressure and dif- Ierential hand levers so that the styli follow the corresponding curves on the chart by which process a numerical value will appear in the counter to be used as a factor in a simple equation whichwill give a product in thousands 01 cubic feet. Thus, it is possible to integrate or decipher a large number 01 charts in a relatively short space of time and the operations can be performed by one operator.

Reference is made to the drawings. A hollow base I carries all of the mechanism excepting a foot controller 2 (Fig. 11) which usually occupies a place on the floor. This controller is the secondary closer of an electrical circuit in which a motor 3 is situated, the former including a source of current 4 as well as wires 5 and 5 which terminate at movable and fixed contacts 1 and 8.

Situated upon the base is a circular chart plate 8, a prime mover or time disk I0 and a pressure disk II. A pressure wheel I2 occupies a position between and in contact with the two disks so that the rotary motion of the disk III will be imparted to the disk II. In order that no slippage may occur, the working face of the disk I0 has a rubber inset I3 vulcanized thereto, and the respective sides of the disk II are equipped with rubber faces l4 and I5.

A so-called differential wheel I3 rides upon the rubber face II of the disk II and as the latter rotates, turning motion is imparted to the wheel I5 and shaft I'l (Fig. 7) which actuates the counter I8. Driving of the chart plate and time shafts I9 and 23 by which the chart plate 9 and time disk III are carried is the simultaneous accompllshment and sole purpose of the motor 3.

Worms 2| and 22 near the endsof a drive shaft 23 (Figs. 3 and 5) mesh with and drive gears 24 and 25 on the shafts I9 and 20. The drive shaft has bearing on end pins 55 and passes through a gear box 28 (Figs. 5 and 19) where it carries a gear 21 that meshes with a worm 28 on a counter shaft 29 which has suitable bearing upon the gear box. A pulley 30 on one end of the counter shaft receives the drive belt 3| of the motor 3 so that as the latter operates, power is delivered to the drive shaft 23 and equally divided between the plate 9 and disk Ill.

Silencing of the foregoing drive mechanism is accomplished by suspending the gear box 28 from 4 a rod 32 (Fig. 19), the ends of which have rubber settings 33 in brackets 34 secured to the underside of the base as shown in Figure 3. The projection of the rod through the gear box prevents the latter from revolving in respect to the drive shaft 23. The motor 3 is secured at 35 (Fig. 20) to one of a pair of plates 35, 31, which are imbedded in and vulcanized to a rubber block 38.

A suitable fastening device 39 secures the plate 31, hence its suspended assembly, to the underside of the base, and inasmuch as rubber is interposed in the connections of both the gear box 23 and motor I to the base I, it follows that thevibrations will be completely damped out and there will be no perceptible noise in the operation of the machine. This is a desirable factor both from the standpoint of the operator and the endurance of the mechanism. While the construction of the latter is rugged, yet it is a desirable quality to obviate any tremor that might possibly have a bad effect.

A slip clutch is interposed between the gear 24 and the chart shaft I9. The latter fixedly carries a cup 48 which receives a pair of arcuate shoes 4I (Fig. 13). These are square in cross section. Each is pivoted upon a screw 42 which is driven into the web of the gear 24. Springs 43, abutting the pivoted and confronting free ends of the shoes press upon the latter and keep the shoes expanded against the inner wall of the cup 43. The friction between the shoes and the cup is ample to maintain the necessary driving effort between the shaft 23 and plate 9, but when the lat- Ser is suddenly stopped, the clutch will yield or A bracket 44 between which and the underside of the base I the slip clutch is situated, furnishes one bearing for the chart shaft I9. -The other is furnished by a bushing 45. The hub 48 of the chart plate 9 rides upon the head 41 of the time control handle 48. This handle is composed of spring material and tends to bend upwardly toward the bottom of the chart plate 9. A depression 49 in the handle is engageable with any one of the slots 50 in the slotted rim 5I of the plate 9.

The rim is divided into ninety-six-slots or teeth,

representing quarter-hour intervals of a twentyfour hour chart. The engagement of the depression 49 with a given slot is intended to maintain the plate 8. A button 53 facilitates the pressing down of the lever and the seating thereof in one of the slots, the pointer 52 being used to indicate that place .on the chart 54 (Fig. 2) up to which a given calculation is to extend.

A weight 53 is designed to hold the chart 54 down. It has an annular groove 51 (Fig. 18) which is deep enough to receive the points of a number of pins 58 fixed in the chart plate 9 and pointing upwardly. The chart is fitted over the shaft I9, and when the weight 56 is put in place the pins are pushed through the chart and the latter is thus held from relative turning. A rubber inset 59 on the chart plate keeps the chart from slipping. As shown in Figure 18 the weight 56 has a central hole that receives the shaft I9, "the latter protruding far enough above the chart plate for the purpose.

A trip 60 (Figs. 5, 10, and 17) carried by the handle 48 is engageable with the head SI of a trigger 62 to release the shoulder 63 from the detent 84 of a slidable plunger and thus stop the machine. For these purposes the trigger B2 is pivoted at 66 to a bracket 61 which is either secured to or forms a part of the base I (Figs. 10 and 17). A spring 63, secured at its ends to the trigger 62 and to the control shaft 69, keeps the head 6| over against the detent 64 so that the head will'always be in position to hold the detent down when the machine is in operation.

This is brought about by turning the control handle 18, and consequently the shaft 69 by which it is carried, to the right in Figures 1, 2, and 4. The control shaft carries what in effect is a bell-crank. The primary arm II of the latter has a forked end 12 which receives a constriction 13 in the plunger 65 (Figs. 11 and 17). It also carries the previously mentioned contact 1 which by virtue of this association, is rendered movable. The secondary arm 14 is situated at a place farther along the shaft. This arm has a flexible connection I5 with one end of a rocker I6. The rocker is fixed on one end of a brake shaft 11.

A spring 18, attached at its ends to the other extremity of the rocker I6 and to some part of the base I, tends to continuously exert a pull on the flexible connection I5 which, being transmitted to the control shaft 69, tends to keep the plunger 85 in an elevated position. It is thus a function of the springs 68 and 18 to keep the Connected slots slot 88 is deep enough to permit enough motion of the trigger to free the detent.

A tube 8| or a suitable equivalent guides-the fiexible element 18 through the base I and to its pad 84 in position to engage the differential wheel I6, liftv it from contact with the disk II, and instantly stop both it and the counter I8 simul-.

taneously with the stopping of the chart plate 9 when the trip 68 displaces the trigger 62.

Thus far it will be understood that the depressed position of the plunger 65 agrees with the running position of the machine. This is brought about by turning the handle 18 to the right as previously stated. .The trigger 82 holds the plunger 85 down and also holds the brake shoe 83 and its pad'84 away from the diflerential wheel i6. The head 6| of the trigger lies in the path of the trip 68, and when the chart plate 9 has rotated sufliciently far to bring the trip 68 against the head, the latter will be displaced so that the spring 18 will at once stop the plate 9 and wheel I6 by rocking the brake shoe and elevating the detent 64 into one of the slots 58.

Brackets 85 and 86 fixedly support rods 81 and 88 11pm which the pressure carriage 89 and the differential carriage 98 respectively slide. A rod 96 situated intermediately of the rods 81 and 88 and pivoted at its ends upon screws 92 has an attached support 93 by which the pressure disk II is carried. The carriages 89 and 98 are slidable upon the rods 91 and 88 in order that the wheels i2 and 36 may be made to traverse one radial side or" the respective disks I8 and II.

The plate support 93, however, is not subject to sliding movement. The weight of the disk I I and its support 93 is partially counter-balanced by a weight 94 applied to an extension 95 of the support at that side of the rod 9| opposite to that on which the disk 6 I is situated. The balanced mounting of the pressure disk permits its ready adaptation to the wheels I2 and I6, and eliminates undue pressure of the disk II on the wheel I2 which would cause difilculty in sliding the wheel 32 between the rubber surfaces 53 and M. A plurality of cams 96 is affixed to the pressure carriage These are designed in agreement with the various pressure ranges likely to be encountered in various charts. Only one of the cams will be brought into play at a time and when a proper adjustment has been made the selected cam will perform its function in the manner to be explained.

A differential cam 91 is afifixed to the carriage 99. This, as in the instance of the group of cams which is attached anv arm I84. This arm has a link connection I85 with the pressure carriage 89 as clearly shown in Figure 15.

The differential handlever I86 is pivoted at I81 and has an arm I88 with link connections I89 to a stub shaft H8 at the upper extremity of which is connected an arm III which in turn has a link connection II2 with the differential carriage 98. The sleeve I83 has bearing in a bushing II3 (Figs. 5" and 8) that-ls suitably affixed to the base I. It extends to approximately even distances above and below the floor of the base and while it furnishes a bearing for the sleeve, the latter intum furnishes'a'bearing for the stub shaft II8.

While the previously discussedlink connections I82 and I89 include arms respectively connected with the sleeve I83 and shaft I I8, these arms are the same in nature as the arms I88 and III. Thus there is the arrangement of a shaft and a concentric sleeve each with arms at the upper and lower extremities. L The upper arms are connected 81 and 88 and cause the wheels I2 and I6 to move laterally o'fthe disks I8 and II. w 3

But the movements ofthe carriages 89 and 98 have a very definite guide in the pressure and differential curves P and D on the chart 54. These so-called curves are inscribed upon the chart during the functioning of the orifice meter recording mechanism. The purpose of the machine is to produce a numerical reading in the counter I8 after the curves P and D have been traced for a pre-determined time period of the chart 54. The tracing is done by styli IM and H5 which in this instance are fountain pens. These comprise ordinary nibs and sacks fitted in steel barrels I I6, I I1 secured to slender extensions M8, M9 '01 pressure-and differential arms E28 and l2I.'

The free extremities ofthe arms are forked to pivotally receive the stems I22 of the extensions. The extensions are easily swung from the arms and the nibs bear upon the chart 54 only by the tional purpose of the rubber inset of the plate 9 is to avoid any danger to the nibs should 'either barrel H6 or Ill be dropped accidentally. By using fountain pens as the tracing points, the operator can see how well he is following the curves P and D as the object would be to make the superimposed curve as nearly co-incident with the previously inscribed curve as possible.

A sleeve I23 (Figs. 9 and 16), secured at M4 to the bracket 86 previously described, provides a bushing for a shaft I25 which is slidable to bring various ones of the group of cams 96 within range of the pressure roller I26 on the secondary member I21 of the pressure arm I28.

The arm I28 is free to turn upon the sleeve I23, the latter having a bottom flange I28 to support the hub I29 of the arm. An extension I38 of the pressure arm ends in a fork I3I which engages a stop I32 on the member I21.

weight of the parts that carry them. An addi Engagement of the fork I3I and stop E32 must always be maintained in order that the motions of the pressure arm I28 may be transmitted to the member I21. But the engagement must be of a. movable nature in order that the raising or lowering of the secondary member may be compensated for. The member I21 is secured at I33 to the shaft I25 and as the latter is slid in its sleeve I23 the member I21 naturally goes with it.

On a similar principle the movements of the differential arm I2I are transmitted to its secondary member I34, but in this instance the connection between the arm and its member is fixed. The'hub I35 of the member I34 is revoluble upon 20 be enabled to "slide the carriages upon the rods the sleeve I29. It has bearing on the hub I29 of the arm I20 (Fig. 16). It includes a pendant fork I 26 through the lower extremities of which screws I21 are driven into the abutting end of the differential arm I2I. The fork has suflicient spread to avoid the hub I29 and insure the latter an unimpeded turning movement.

A roller I20 carried by the secondary member I94 bears against the diiferential cam 91. Inas much as this is but a single cam no vertical adjustment of either the member I34 or the diiferential arm I2I is needed. The members I21 and I24 are actually parts of the pressure and differential arms I20, I 2I and for the purpose of identification and also distinction may be known as the pressure and differential roller arms. Springs I64 and I65 anchored to a post I66 (Figs. 2 and 4) and connected with the arms I20 and I2I keep the rollers I26 and I26 in contact with the respective cams.

Vertical adjustments of the shaft I25 are made by means of an indicator handle I39. This handle traverses a scale I40 (Figs. 1 and 4) which has divisions equal in number to that of the cams in the group 96 and supplied with indicia concerning the various pressure ranges with which the machine will be concerned. For instance, the indicia riading from left to right will be 500# 250# 100# 50# and 25# Vac.

A shaft I4 I, journaled between an upright wall of the base and a pendant bracket I42, carries the handle I99 in the exposed position, and an eccentric I43 at a place immediately below the shaft I25. The eccentric has a peripheral groove I44 which is periodically interrupted with depressions I45 into which the point I46 of the shaft I25 will settle and thus preserve a given adjustment. Upon turning the handle I29 the eccentric I42 will ride under the shaft I25 and raise the latter by virtue of its eccentric, the engagement of the point with a given depression retaining both the shaft I25 and the handle I29 at its indication.

Reverting to the description of the carriages 09 and 90 as well as the plate support 93, it is observed in Fig. 15 that the pressure carriage 89 includes a pair of bosses I41 which receive and slide upon the rod 01. An extension I49 from the inner side of the carriage terminates in a fork I49 which is equipped with bearings I50 (Fig. 6) for the pintles III of the pressure wheel I2. The differential carriage 90 also has an extension I52 (Fig. 2) which terminates in a bearing in which the pintles I54 of the differential wheel I6 are supported as shown in Fig. 7.

The foregoing bearing includes an enlargement I55 in which the extension tube I56 of the counter I6 is fixedly fitted. This tube houses the counter shaft I1. The inner end of the shaft I1 is reduced at I51 (Fig. 7) to fit into a similarly shaped bore in one of the pintles of the differential wheel I6. Thus when the latter is rotated the counter will be driven in a customary manner, for the counter is a product bought in the open market.

The plate support 93 sustains the pressure disk II in a balanced position. The details of the former are seen in Figures 6 and 21. The inner end of the support has a hollow boss I59 in which the shaft I59 of the disk II is supported by ball bearings I60. The upper end of the shaft carries a plate I6I to which the disk II is secured. As shown in Figure 5 the shaft 20 of the disk I0 has bearings I62 both in the floor of the base and upon a bracket I63 by which one of the beginning of the pressure and two end pins 55 of the drive shaft is carried.

The operation is as follows: A chart 54 as taken from the meter in the field, is placed upon the chart plate 9 and secured both by means of the loose weight 56 (Fig. 18) and the pins 59. Presumably the plunger 65 is in the elevated position to which it was impelled during the prior stopping oi' the machine so that the detent 64 cccupies one of the numerous slots 50. The chart will be so placed that the starting point falls directly beneath the pointer 52. The button 52 is pressed down until the depression 49 is free of the slot 50.

This act lowers the plunger 65. The shoulder 62 of the trigger head 6| catches and holds the detent 64 down. The pull imparted to the flexible element 15 turns the rocker 16 to the left in Figure 17 both lowering the diii'erential wheel I6 to the surface of the disk I I and releasing the brake pad 84 from its periphery. In this connection it must be understood that the link connection H2 with the differential carriage is sufficiently loose to permit the limited turning of the carriage that ensues upon the engagement of the brake pad with the differential wheel. Lowering of the plunger 65 primarily closes the circuit 5, 6, (Fig. 11) at the contacts 1 and 8.

Turning motion is imparted to the handle 49 until the pointer 52 comes adjacent to the desired stopping time on the chart. Thus will be represented a time period for which the flow of fluid is to be calculated. The reading of the counter I8 is noted. The handles 99 and I06 are grasped, and the pens Ill and II 5 moved to the diflerential curves P and D respectively. The motor 3 is started by depressing the foot controller 2 where a secondary closure and completion of the circuit 5, 6 occurs.

As the chart plate 9 revolves the operator will shift the hand levers 99 and I 06 as may be needed to keep the pens in accurate tracing position upon the curves. As the chart plate 9 revolves the time disk I0 will revolve in a fixed ratio by virtue of the common drive shaft 23. There is an offset between the centers of disks I0 and II; therefore, the distance of the pressure wheel I2 from the center of the disk I0 will determine the ratio of revolutions between the disks I0 and II.

The relationship of the roller I26 to the cam group 96 is such that only the lower part of the roller will be effective as respecting the cams. This can be understood from Figures 2 and 15 which show the progressive smallness of the cams. Only the largest camwill be effective upon the roller and the successive stages to which the roller will be elevated will find the lower part otthe roller opposite to that cam which at that Particular adjustment will be effective upon the pressure member I21.

The cams 96 are so set up that for any position of the pressure wheel I2 on the face of the time disk I0 the pressure pen II4 will indicate a graduation on the chart which is ten times the square of th of the revolutions made by the pressure disk II while the chart plate 9 makes one revolution. In other words, it may be stated that the revolutions of the pressure disk II during the time that the chart plate 9 turns through one hour of time recorded on the chart are equal to fifth of the numerical square root of the ab solute pressure at that time being indicated by the pressure pen II 4. On this principle, the number of revolutions of the pressure disk II for a number of indicated hours on the chart I4 become equal to the expression Time x4? As already stated, there is one cam 88 for each standard pressure range likely to be encountered. The above explanation holds true for each of the cams. The successive cams are thrown into action by adjusting the indicating handle I38 over the scale 0. As the handle is turned to the right in Figure 4, the shaft I25 is correspondingly elevated by means of the eccentric I43 until the pressure roller I28 stands opposite to the desired cam.

As the diflerential wheel l8. moves across the face of the pressure disk ll, its rate of rotation of course varies with its distance from the center of the disk. The cam 81 is so set up that this rate or ratio becomes some constant multiple or the square root of the differential reflected by the position of the differential pen H5. Therefore, it may be said that the revolutions of the wheel ii are some multiple of TimeXw/P /1) and therefore the revolutions as registered in the counter l8 are some known multiple of the aforementioned extension 012 the chart.

During these operations the pointer 52 approaches the stopping point. Upon engagement of the trip 60 with the head SI of the trigger 62 (Figs. 11 and 17) the trigger will be displaced permitting the spring I8 to elevate the plunger 65 and project the detent 64 into the nearest slot 50. This instantly locks the chart plate 9 against further turning, and simultaneously opens the motor circuit at the contacts I, 8, as well as lifts and stops the differential wheel l6 by means of the brake shoes 83 and 84,

The momentum of the motor as well as that of the disks l0 and i l cause these parts to continue running for a time, but theslippage of the clutch in Figs. 10 and 13, permits the chart plate 9 to stand still and prevents any damage to the mechanism due to the sudden stop. The reading of the counter I8 is again taken and after deducting the original reading the difference is some known constant multiple of the extension" of the chart.

While the construction and arrangement of the improved chart integrator is that of a generally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the claims.

I claim:

1. A calculating machine comprising a chart plate, a time disk driven in unison therewith, a revolving pressure disk, a counter having a difierential wheel driven by the pressure disk, and a pressure wheel in driving contact with both disks and movable radially of both disks in accordance with the fluctuations of an inscribed curve on a chart carried by the chart plate to variably drive the differential wheel.

2. A calculating machine comprising a chart plate, a time disk driven in'unison therewith, a revoluble pressure disk, a counter operable by the pressure disk, a pressure wheel in driving contact with both disks, and means for moving the pressure wheel radially or both disks responsive to fluctuations in an inscribed curve on a chart carried by the chart plate to vary the driven ratio of the pressure disk.

3. A calculating machine comprising a chart plate, a time disk driven in unison therewith, a

revoluble pressure disk, a counter having a differential wheel driven by the pressure disk, a pressure wheel in driving contact with both disks, and independent means for independently moving each wheel radially of the respective disks in accordance with fluctuations in inscribed curves on a chart carried by the chart plate.

4. A calculating machine comprising a chart plate, a revoluble pressure disk, a counter having a differential wheel'driven by the pressure disk, driving means in direct rotating contact with the pressure disk, separate carrying means having styli to trace the fluctuations of curves inscribed on a chart carried by the chart plate and having articulated connections with said diiferential wneel and disk driving means and means to correspondingly shift said separate means for independently shifting the positions of the disk driving means and differential wheel in respect to the pressure disk to variably rotate the pressure disk and the counter.

5.'A calculating machine comprising a chart plate, a driving disk, a pressure disk, driving means between said disks comprising a wheel, in direct contact with both disks, a counter having a differential wheel driven by the pressure disk, separate carriages for the driving means and differential wheel, a cam on each carriage, arms capable of movement by the cams having styli, and

means to independently shift the carriages in accordance with the fluctuations in the tracing by the styli of curves inscribed on a chart carried by the chart plate to variously revolve the pressure disk and the counter.

6. A calculating machine comprising a chart plate, a pressure disk, a carriage having driving means for revolving the disk, a counter having a difierential wheel driven .by the disk, an arm having a stylus for tracing a curve inscribed on a chart carried by the chart plate, a plurality of cams capable of moving the arm, each cam being designed for a particular pressure range in a succession of charts, and means for shifting the carriage to vary the position of the driving means and hence the rate of revolution of the disk and the counter in accordance with one cam.

7. A calculating machine comprising a chart plate, a pressure disk, a carriage having driving,

means for revolving the disk, a counter having a differential wheel driven by the disk, a plurality of cams on the carriage variously designed for different pressure ranges in a succession of charts, a stylus to trace an inscribed curve on a selected chart applied to the chart plate, means to-variously shift the carriage within range of the fluccession of standard pressure ranges, a single cam on the other carriage, arms rendered movable by the cams of each carriage and having styli to trace curves inscribed on a selected. chart applied to the chart plate, and separate means for shifting the carriages within range of the curve fluctuations thus to variously position the. driving means and differential wheel in respect to the pressure disk and variously drive the counter.

the carriages being variously designed for a suc- 9. In a calculating machine, a revoluble pressure disk, a driven pressure wheel bearing on one face of and revolving the disk, a counter having a differential wheel bearing on the other face, and a counter-balanced bracket supporting the disk and yieldingly adapting it to driving contact with said wheels.

10. In a calculating machine, a disk, a counter having a diiferential wheel bearing on one face of the disk, a drive wheel bearing on the other face of the disk, a weighted bracket supporting the disk between the wheels, and pivots upon which the bracket is balanced.

11. A calculating machine comprising a movable chart plate, a counter, differential drive mechanism for the counter, a plurality of cams associated with said mechanism, a stylus for tracing a curve inscribed on a chart carried by the chart plate and having an arm associated with the cams, and means for shifting the arm into the operating plane of the respective cams to produce a variable co-ordination of the differential mechanism with various charts representing diiferent pressure ranges.

12. In a calculating machine, an arm having a stylus, a plurality of cams, a secondary member co-acting with the cams and having a slip connection with said arm, and means for moving the secondary member relatively to the arm by virtue of said slip connection to bring said member into operative relation with the various cams without interfering with an established, operating position of the cams.

13. In a calculating machine, an arm having a stylus, a mounting upon which the arm can turn, a secondary member having a slip connection with said arm, a shaft to which said member is attached for corresponding turning, a plurality of cams with which the member 00- acts, and means for slidably adjusting the shaft in reference to said mounting to sustain the secondary member in the various working zones of the cams.

14. In a calculating machine, a plurality of cams, an arm having a stylus, a secondary member associated with the earns, a shaft to which said member is aflixed, a fixed sleeve receiving the shaft and supporting the arm in a turning position, means to slide the shaft by steps to bring said member within range of selected cams, and a slip connection between the arm and said member to compensate for the sliding of the shaft yet maintaining the operating connection between said member and the arm.

15. A calculating machine comprising a chart plate and a time disk, a motor having common drive mechanism for driving the plate and disk in unison, a counter having differential mechanism driven by the time disk, a stylus control for regulating the ratio of said mechanism to said time disk in accordance with the undulations of a curve inscribed on a chart carried by the plate, means for simultaneously stopping the chart plate and counter at an appointed position of the chart, and a slip clutch embodied in said drive mechanism to dissipate the momentum of said motor and differential mechanism.

16. A calculating machine comprising a chart plate and a pressure disk, drive mechanism for revolving the plate and disk at uniform and variable rates respectively, a counter having a differential wheel in contact with and driven by the pressure disk, a pointer associated with the chart plate to indicate a stopping point, and means associated with said pointer for simultaneously stopping the chart plate and raising the differential wheel from the pressure disk to stop its rotation.

17. A calculating machine comprising a chart plate and a pressure disk, drive means therefor, a counter having a differential wheel driven by said disk, a pointer adjustable to a selected stopping point on a chart carried by said plate, a trip associated with the pointer, a connected detent and rocker the latter having a brake shoe adjacent to the differential wheel, a spring connected with the rocker, and a trigger holding the detent away from the chart plate, being displaceable by the trip to release the detent and rocker permitting the spring to apply the detent to the plate and the brake shoe to the wheel for stopping the plate and both lifting and stopping the wheel.

18. In a calculating machine, a chart plate and a differential wheel, a plunger having a detent associated with the chart plate, a brake shoe associated with the wheel and having a rocker, a control shaft having a secondary arm connected with the rocker, and a primary arm on said shaft connected with the plunger so that a sliding movement of the plunger by virtue of turning the shaft in one direction will rock the rocker and vice versa.

19. In a calculating machine, a chart plate, an electric motor having a drive for revolving the chart plate, a detent having a plunger, a control shaft having an arm connected with the plunger being movable therewith either to depress the detent or permit the detent to engage the chart plate, an electrical circuit embracing the motor having contacts primarily engaged by the arm upon depression of the detent, and a secondary closure for completing the circuit after said depression.

20. A calculating machine for obtaining the integral of the product of the square roots of two quantities represented by curves on a chart comprising a chart plate adapted to receive a chart having the two curves thereon, a counter, a stylus adapted to follow one curve, an arm for moving said stylus, a prime mover for driving said counter, and means for varying the movements of said counter by the varying positions of said stylus including a plurality of cams, said arm having a member co-acting with a selected cam, and means for selectively associating said memher for co-action with one cam.

21. A calculating machine for obtaining the integral of the square roots of two quantities represented by curves on an orifice meter chart comprising a chart plate adapted to receive an orifice meter chart having two curves thereon, a counter, a stylus arm carrying a stylus adapted tofollow one curve, a prime mover, driving means between said mover and counter, and means for varying the ratio of said driving means in accordance with variations of the curve including a carriage having a plurality of cams, a followup mechanism to cause said stylus to reflect the movements of the carriage, and means to selectively associate said stylus with any cam on said carriage.

22. In a calculating machine for obtaining the integral of the product of the square roots of two quantities represented by curves on a chart, a driven time disk, a pressure disk substantially parallel to and spaced from said time disk, 8. pressure wheel in contact with both disks for driving said pressure disk from said time disk, and means to move said pressure wheel radially of said disks in accordance with variations in a curve, said means being so proportioned and arranged that the revolutions of the pressure disk are always proportional to the square root of the quantityrepresented by the curve.

23. In a calculating machine for obtaining the integral of the product of the square roots of two quantities represented by curves, a driven time disk, a pressure disk parallel to and spaced from said time disk, 8. pressure wheel in contact with both disks for driving said pressure disk from said time disk, a manually adjustable carriage for moving said pressure wheel radially of said disks, an arm having a stylus adapted to follow a curve on a chart, and means for causing said stylus to follow movements of said carriage, said means being so proportioned that the revolutions of the pressure disk are always proportional to the square root of the quantity represented by the curve.

24. The invention as defined in claim 23 wherein the said means includes a cam on said carriage,

; and a spring biasing said stylus arm against said cam.

25. The invention as defined in claim 23 wherein the said means includes a plurality of cams on said carriage, a spring biasing said stylus arm toward said cams, and means for selectively associating said stylus arm with any of said cams.

26. In a calculating machine for obtaining the integral of the product of the square roots of two quantities represented by curves, a chart plate adapted to receive a chart having curves thereon, a counter, a pivoted arm carrying a stylus adapted to follow one curve, a pivoted secondary member having a slip connection with said arm, a plurality of cams adapted to be selectively engaged by said member, and means to move sald'member axially to engage said member with one selected cam.

2'7. The invention as defined in claim 26 wherein the said means includes a manually operable eccentric to move said member.

28. The invention as defined in claim 26 wherein said member is secured to a shaft, said shaft being pivotally mounted, and said means includes a manually operable eccentric to move said shaft axially and thereby associate said member with a selected cam.

29. A calculating machine for obtaining the integral of the square root of the product of two quantities represented by curves comprising a rotary chart plate adapted to receive a chart having two curves thereon, a counter, two arms each carrying a stylus, each stylus adapted to follow one curve, a driven prime mover, a driving connection between said prime mover and said counter, two independent means for separately varying said driving connection to vary the speed of said counter, additional means in contact with the other a counter with a difierential wheel bearing on the disk, a plurality of cams on one of the carriages being variously designed for a succession of standard pressure ranges, at least one cam on the other carriage, arms rendered movable by the cams of each carriage having styli to trace curves inscribed on a selected chart and applied.

to the chart plate, and separate means for shifting the carriages within range of the curve fluctuations thus to variously position the driving means and differential wheel in respect to the pressure disk and variously drive the counter.

31. A calculating machine for orifice meter charts comprising a rotary member adapted to receive a chart having a static pressure curve and a differential pressure curve thereon,- tracing points movable over said charts and manually operable to follow the curves thereon, a friction wheel and an indicator driven thereby, a driven disk in engagement with said friction wheel, and a friction drive engaging said driven disk and rotating the same at variable speeds in accordance with one of said curves.

32. The invention as defined in claim 31 wherein said friction drive comprises a driving wheel directly engaging said driven disk.

33. A calculating machine for orifice meter charts comprising a member adapted to receive a chart having a static pressure curve and a differential pressure curve thereon, tracing points movable over said chart to follow the curves thereon, a driving member, a driven disk frictionally contacting with and driven by said driving member, means to adjust the relative positions of said disk and driving member in accordance with the movements of one tracing point, a friction wheel contacted and driven by said driven disk, and means to adjust the relative positions of said friction wheel and driven disk in accordance with the movements of the other tracing point.

34. An integrator for the charts of orifice meters comprising. a platen adapted to receive a chart, driving means tending to rotate said platen and chart, stop mechanism normally maintaining said platen stationary against the action of said driving means; mechanism operable in accordance with the curves on said chart for indicating the integral of the square root of the products of two quantities represented by curves on said chart, means normally maintaining said indicating means inoperable, and means for simultaneously releasing said platen and rendering said indicating mechanism operable.

35. The invention as defined in claim 34 wherein said indicating mechanism includes a friction wheel, and said means for rendering said indicating mechanism operable causes said wheel to engage a driven member.

36. The invention as defined in claim 34 in combination with means for simultaneously stopping said platen and rendering said indicating means non-operative.

37. An integrator for the charts of orifice meters comprising a platen adapted to receive a chart, frictional driving means tending to rotate said platen and chart, stop mechanism for holding said platen stationary against the action of said frictional driving means, mechanism for obtaining the integral of the square root of the prodnot of two quantities represented by curves on said chart and including a friction wheel, and means for simultaneously operating said stop mechanism to release said platen and for rendering said friction wheel operable.

38. The invention as defined in claim 37 in combination with means for automatically stopping said platen and rendering said friction wheel non-operative after said platen has made substantially one complete revolution.

integral of the square root ofthe product of two quantities represented by two curves comprising a platen adapted to receive a chart having two curves thereon, a driving member, a driven member, said two members being in frictional contact with the rim of one member engaging the face of the other, means for moving one of said members in accordance with the variations of one of said curves thereby to vary the speed of the driven member, and a friction wheel contacted and driven by said driven disk and having an indicating device operably associated therewith.

40. The invention as defined in claim 39 having means for varying the relative position of said friction wheel and said driven member in accordance with variations of the other of said curves.

41. A calculating apparatus comprising a rotatable platen adapted to receive a chart; means for impositively rotating said platen; a stop member for holding said platen against rotation; a plurality of peripherally engaging members for integrating the curves on the chart; and means cooperating with said stop member for disengaging one of said peripherally engaging members when said stop mechanism is operated.

42. A calculating apparatus comprising a rotatable disk; means for driving said disk; a rotatable member adapted to receive a chart; impositive driving means operated by the disk driving means for rotating said member; a plurality of peripherally engaged members including a counter; mechanism operably connected thereto and adapted to engage said disk for integrating the curves on said chart; a stop member for bolding said rotatable member against rotation; and means for disengaging said counter mechanism from said disk to render the same inoperative.

43. In an integrator for meter charts, an inv dicat'ir having a friction wheel associated therewith; a driven disk; means mounting said indicator and wheel for movement toward and away from said disk for driving engagement therewith; and means for bringing said friction wheel to rest against the action of its rotational inertia substantially simultaneously with the removal thereof from said disk.

44. In a calculating apparatus, an indicator having a friction wheel associated therewith; a driving disk; means mounting said indicator and wheel for movement toward and away from said disk for placing said wheel in driving engagement with said disk; means for moving said indicator and wheel away from said disk, and means for bringing said friction wheel to rest against the action of its rotational inertia substantially simultaneously with its withdrawal from said disk, said means comprising a brake member staticnarily mounted with respect to said indicator and wheel and adapted to engage the periphery of said wheel when the same is moved away from said disk.

45. A calculating apparatus comprising a rotatable platen adapted to receive a chart, a driving disk, means for impositively rotating said platen, means for rotating said driving disk, a plurality of engaging members driven from said driving disk for integrating the curves on said "chart, a stop ,member for holding said platen against rotation, and means cooperating with said stop member for disengaging one of said engaging members when said stop member is operated while said driving disk continues to operate.

46. A calculating apparatus comprising a rotatable platen adapted to receive a chart having a curve thereon, a driving disk, means for impositively rotating said platen, means for rotating said driving disk, a pivoted arm carrying a tracing point, a plurality of engaging members driven from said driving disk for integrating the curves on said chart as said tracing point follows the curve and including a counter mechanism, a

stop member for holding said platen against ro-' tation, and means cooperating with said stop member for disengaging said counter mechanism when said stop member is operated while said driving disk continues to operate.

47. A calculating apparatus comprising a rotatable member adapted to receive a chart, a driving disk, means for rotating said driving disk, interconnected integrating mechanism operable by said driving disk, means for effecting impositive rotation of said member from said first means, and stop means for holding said member against rotation and breaking said interconnection while said first means continues to rotate said driving disk.

JOHN B.- MCGAUGHY.

CERTIFICATE OF CORRECTION.-

Patent No. 2,057,664; October 20,1956.

JOHN B. MCGAUGHY.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction. as follows: Page '8, first column, line 10, claim 59, for the word "disk" read member; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of December, A. D. 1956.

- Henry Van Arsdale (Seal) Acting Commissioner of Patents.

Patent No. 2,057,664.

CERTIFICKTE or CORRECTION.-

October 20; 1936.

JOHN B. MCGAUGHY.

' It is hereby certified that error appears in the printed specification or the above numbered patent requiring correction. as follows: Page 8, first column, line l0, claim 59, for the word "disk" read member; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of December, A. D. 1956.

Henry Van Arsdale (Seal) Acting Commissioner of Patents. 

